Questions In The Financial Times About The Euro That We Can Answer

It is a question that I have been asking myself for a while: at what point does it become economically rational for a country to leave the eurozone? Which is a difficult question to answer although we'll have a stab at it.

http://www.forbes.com/sites/timworstall/2013/04/01/questions-in-the-financial-times-about-the-euro-that-we-can-answer/